CN115628027A - Mechanical external cutting tool for oil pipe - Google Patents
Mechanical external cutting tool for oil pipe Download PDFInfo
- Publication number
- CN115628027A CN115628027A CN202211629294.5A CN202211629294A CN115628027A CN 115628027 A CN115628027 A CN 115628027A CN 202211629294 A CN202211629294 A CN 202211629294A CN 115628027 A CN115628027 A CN 115628027A
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- Prior art keywords
- cutter
- outer cylinder
- peripheral wall
- sleeve
- oil pipe
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- 238000005520 cutting process Methods 0.000 title claims abstract description 48
- 238000010168 coupling process Methods 0.000 claims abstract description 65
- 238000005859 coupling reaction Methods 0.000 claims abstract description 65
- 230000008878 coupling Effects 0.000 claims abstract description 64
- 230000002093 peripheral effect Effects 0.000 claims abstract description 47
- 238000004873 anchoring Methods 0.000 claims description 10
- 239000003921 oil Substances 0.000 description 59
- 238000010276 construction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003129 oil well Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010730 cutting oil Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
- E21B29/007—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-retracting cutter rotating outside the pipe
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a mechanical external cutting tool for an oil pipe, which comprises: the invention discloses a tool bit, which comprises an upper joint, a main outer cylinder and an anchor grab sleeve, wherein the outer peripheral wall on the right side of the upper joint is inserted into the inner peripheral wall on the left side of the main outer cylinder, the main outer cylinder is connected with the upper joint through a releasing shear pin, the right end of the anchor grab sleeve is abutted against a thrust roller bearing, the left end of the anchor grab sleeve is abutted against the right end of a coupling body, a starting shear pin penetrates through the main outer cylinder and is inserted into the outer peripheral wall of the anchor grab sleeve, the left end of an inner support ring is abutted against the thrust roller bearing, the left side of a cutter body assembly is connected with the right side of the inner support ring through a screw, the right side of the cutter body assembly is abutted against the left side of a push broach block, the push broach block is connected onto the right side of the main outer cylinder through a screw, and the outer peripheral wall on the left side of a lower joint is connected with the inner peripheral wall on the right side of the main outer cylinder through a screw thread, and the tool bit has the advantages that: can let the cutting means steady or stable carry out the external cutting to oil pipe.
Description
Technical Field
The invention relates to the technical field of petroleum process equipment manufacturing, in particular to a mechanical external cutting tool for an oil pipe.
Background
Downhole gas production or oil recovery in an oil well requires a tubing, which is a pipe that transports crude oil and natural gas from a hydrocarbon reservoir to the surface after drilling is completed.
When the oil pipe is blocked or buried in the well in the process of extraction and transportation or operation, the oil pipe cannot be normally lifted out, so that the oil pipe string can be smoothly lifted out only by fishing the oil pipe, the tool is a fishing process for cutting the oil pipe outside the small casing well casing, namely, an external cutting process of the oil pipe body is realized, the oil pipe string on the upper part of the blocked or buried section is fished out to be smoothly lifted out of the well, and after the well casing on the blocking and burying point is recovered to be smooth and free of foreign matters, construction conditions are provided for fishing the oil pipe of the blocking and burying point in the later period.
Because the oil pipe string connection mode is that the body is added with the coupling and is added with the body alternately, the external cutting tool string is required to pass through the outside of the oil pipe coupling and reach the cutting operation depth, the external cutting tool swings the cutter to cut the oil pipe body, and the pipe string on the clamped buried section is cut and fished and smoothly goes out of the well, so that the subsequent normal construction operation is recovered. However, how to ensure the maximization of the drift diameter and the minimization of the outer diameter of the external cutting tool, and how to satisfy the working condition strength of the tool and how to stably perform the external cutting of the oil pipe is a technical problem to be solved urgently in the process of gas production or oil production.
Disclosure of Invention
The invention aims to solve the technical problem of how to stably or stably cut the outside of an oil pipe, and provides a mechanical external cutting tool for the oil pipe, which can stably or stably cut the outside of the oil pipe.
The invention is realized by the following technical scheme:
a mechanical external cutting tool for a tubing, comprising:
an upper joint;
the outer peripheral wall of one side of the upper joint is inserted into the inner peripheral wall of the other side of the main outer cylinder, and the main outer cylinder is connected with the upper joint through a releasing shear pin;
one end of the anchor grabbing sleeve abuts against the thrust roller bearing, the other end of the anchor grabbing sleeve abuts against one end of the coupling body, the outer peripheral wall of the coupling body is attached to the inner peripheral wall of the upper joint, and the anchor grabbing sleeve is used for anchoring on the coupling body;
the other end of the inner supporting ring is propped against the thrust roller bearing;
the oil pipe cutting device comprises a cutter body assembly, a main outer cylinder and a cutter pushing block, wherein the cutter body assembly is used for cutting an oil pipe in a self-rotating manner, the other side of the cutter body assembly is connected with one side of an inner supporting ring through a screw, one side of the cutter body assembly abuts against the other side of the cutter pushing block, and the cutter pushing block is connected inside the main outer cylinder through a screw;
and the outer peripheral wall of the other side of the lower joint is in threaded connection with the inner peripheral wall of one side of the main outer cylinder.
The coupling body sets up the inside of top connection, the right side internal perisporium of coupling body supports and leans on oil pipe's left side periphery wall, and the right side internal perisporium of coupling body and oil pipe's left side periphery wall all are the toper inclined plane, and the left end of coupling body supports and leans on there is the thrust instrument.
The anchor grab sleeve and the inner support ring are arranged inside the main outer cylinder, the positioning reducing pin penetrates through the main outer cylinder and is in interference fit with the outer peripheral wall of the inner support ring, a gap is formed between the right end face of the anchor grab sleeve and the left end face of the inner support ring, and the thrust roller bearing is located in the gap.
The anchor grabbing sleeve is provided with an anchor grabbing sleeve, the peripheral wall of the anchor grabbing sleeve is provided with a groove, the starting shear pin penetrates through the main outer cylinder and is inserted into the groove, and the right end face of the anchor grabbing sleeve abuts against the thrust roller bearing.
The anchor grabbing sleeve is connected with an anchor grabbing elastic sheet through a screw, and the left end face of the anchor grabbing elastic sheet is anchored to the right end face of the coupling body.
The left end face of the anchor grasping shrapnel is provided with a serration which is propped against the right end face of the coupling body.
The right side of the inner supporting ring is connected with the left side of the cutter body assembly through a screw, the cutter body assembly is arranged between the main outer cylinder and the push cutter block, and the right end of the push cutter block abuts against the main outer cylinder.
The cutter body assembly is provided with a cutter body and a swinging cutter, the left side of the cutter body is connected with the right side of the inner support ring through a screw, the swinging cutter is located on the right side of the cutter body, a U-shaped through groove and a U-shaped blind groove are formed in the right side of the cutter body, the U-shaped through groove is communicated with the U-shaped blind groove, the left side of the cutter body is located in the U-shaped through groove, a pin shaft penetrates through the right side of the cutter body and the swinging cutter located in the U-shaped through groove, the pin shaft is hinged to the swinging cutter, and the pin shaft is fixed on the cutter body.
The U-shaped through groove is internally provided with a swing knife limiting elastic sheet which is provided with elastic end pieces, one of the elastic end pieces abuts against the lower end face of the swing knife, and the other elastic end piece abuts against the bottom face of the U-shaped blind groove.
And part of the swing knife limiting elastic sheet is positioned in the U-shaped through groove, and the swing knife limiting elastic sheet is Z-shaped.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention utilizes the right push of the coupling body to make the serration on the left end surface of the anchor grasping shrapnel contact with the right end surface of the coupling body, the right shift of the anchor grasping shrapnel makes the cutter body component move rightwards, the cutter body component moves rightwards to make the right upper end of the swinging cutter contact with the left end of the push cutter block, the swinging cutter moves or swings towards the peripheral wall direction of the oil pipe and clamps the peripheral wall of the oil pipe, the coupling body and the upper and lower joints rotate, the coupling body makes the anchor grasping shrapnel rotate and the anchor grasping sleeve rotate, the anchor grasping sleeve rotates the inner supporting ring and the cutter body component through the thrust roller bearing, the swinging cutter can rotate to cut the peripheral wall of the oil pipe, the anchor grasping component and the right end surface of the coupling body are relatively fixed and have no rotary displacement, the cutting point and the anchoring point are axially fixed, the thrust bearing separates the anchor grasping sleeve and the inner supporting ring to separate the cutting rotary force of the coupling body and the upper and lower joints from the rotary cutting force of the anchor grasping component, the cutting point (the serration of the serration on the left end surface of the anchor grasping shrapnel and the right end surface of the coupling body) and the roller of the coupling body and the anchoring point) are ensured to have no rotary displacement, and the stability of the cutting blade in the cutting process is increased.
2. After the outer peripheral wall of the oil pipe is cut, the coupling body moves leftwards, the swinging cutter is opened towards the opposite direction of the outer peripheral wall of the oil pipe under the action of the swinging cutter limiting elastic sheet, the outer peripheral wall of the left side of the oil pipe is always clamped on the inner peripheral wall of the right side of the coupling body, the coupling body and the upper joint or the lower joint are lifted to fish the cut oil pipe section together with a cutting tool from an oil well, and construction conditions are provided for fishing of a post-processing clamping and burying point oil pipe.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a front sectional view of the present invention;
FIG. 2 is an enlarged view taken at A of FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of FIG. 1 at B according to the present invention;
FIG. 4 is a perspective view of the present invention anchor sleeve;
FIG. 5 is an enlarged view of FIG. 4 at C in accordance with the present invention;
FIG. 6 is a perspective view of the top view cutter body assembly of the present invention;
fig. 7 is a perspective view of the bottom view cutter body assembly of the present invention.
Reference numbers and corresponding part names in the drawings:
1-upper joint, 2-releasing shear pin, 3-main outer cylinder, 4-anchoring and grabbing elastic sheet, 41-fine teeth, 5-anchoring and grabbing sleeve, 51-anchoring and grabbing sleeve, 52-groove, 6-starting shear pin, 7-gap, 8-thrust roller bearing, 9-positioning and reducing pin, 10-inner support ring, 11-cutter body component, 111-cutter body, 112-U-shaped through groove, 113-U-shaped blind groove, 114-bottom surface, 12-pendulum cutter, 121-lower end surface, 13-pusher block, 14-lower joint, 15-pendulum cutter limiting elastic sheet, 151-elastic end sheet, 16-cutting blade, 17-pin shaft, 18-coupling body and 19-oil pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a mechanical external cutting tool for oil pipe, comprising: the device comprises an upper joint 1, a releasing shear pin 2, a main outer cylinder 3, an anchor grasping elastic sheet 4, an anchor grasping sleeve 5, a thrust roller bearing 8, a positioning reducing pin 9, an inner support ring 10, a cutter body assembly 11, a push-type cutter block 13 and a lower joint 14.
The outer peripheral wall on the right side of the upper joint 1 is inserted into the inner peripheral wall on the left side of the main outer cylinder 3, the main outer cylinder 3 is connected with the upper joint 1 through the releasing shear pin 2, the right end of the anchor grab sleeve 5 abuts against the left end of the thrust roller bearing 8, the left end of the anchor grab sleeve 5 abuts against the right end of the coupling body 18, the anchor grab sleeve 5 is used for being anchored on the coupling body 18, the starting shear pin 6 penetrates through the main outer cylinder 3 and is inserted into the outer peripheral wall of the anchor grab sleeve 5, the left end of the inner support ring 10 abuts against the right end of the thrust roller bearing 8, the rotation of the coupling body 18 drives the anchor grab elastic sheet 4 to rotate, the starting shear pin 6 is sheared, the anchor grab sleeve 5 rotates, the anchor grab sleeve 5 pushes the thrust roller bearing 8 to rotate, the rotation of the thrust roller bearing 8 drives the inner support ring 10 and the cutter body assembly 11 to rotate, and the thrust roller bearing 8 enables the anchor grab sleeve 5 and the inner support ring 10 to generate relative rotation, namely, and a rotational speed difference exists between the anchor grab sleeve 5 and the inner support ring 10.
The cutter body assembly 11 is used for a rotatable cutting oil pipe 19, the left side of the cutter body assembly 11 is connected with the right side of the inner supporting ring 10 through screws, the right side of the cutter body assembly 11 is abutted against the left side of the push-type cutter block 13, the push-type cutter block 13 is connected inside the main outer barrel 3 through screws, and the outer peripheral wall of the left side of the lower joint 14 is connected with the inner peripheral wall of the right side of the main outer barrel 3 through threads.
As shown in fig. 1-2, the anchor sleeve 5 and the inner support ring 10 are arranged inside the main outer cylinder 3, the positioning reducing pin 9 penetrates through the main outer cylinder 3 and is in interference fit with the outer peripheral wall of the inner support ring 10, a gap 7 is formed between the right end face of the anchor sleeve 5 and the left end face of the inner support ring 10, and the thrust roller bearing 8 is located in the gap 7.
As shown in fig. 4 to 5, the anchor grab sleeve 5 has an anchor grab sleeve 51, the outer peripheral wall of the anchor grab sleeve 51 has a groove 52, the starting shear pin 6 passes through the main outer cylinder 3 and is inserted into the groove 52, the right end face of the anchor grab sleeve 51 abuts against the thrust roller bearing 8, the anchor grab sleeve 5 is connected with the anchor grab leaf 4 through a screw, the left end face of the anchor grab leaf 4 is anchored on the right end face of the coupling body 18, the left end face of the anchor grab leaf 4 has serrations 41, and the serrations 41 abut against the right end face of the coupling body 18 to make friction exist between the serrations 41 and the right end face of the coupling body 18, that is, the rotation of the coupling body 18 can drive the serrations 41 to rotate.
The right side of the inner supporting ring 10 is connected with the left side of the cutter body assembly 11 through a screw, the cutter body assembly 11 is arranged between the main outer cylinder 3 and the push cutter block 13, and the right end of the push cutter block 13 abuts against the main outer cylinder 3.
As shown in fig. 3, 6 and 7, the cutter body assembly 11 has a cutter body 111 and a pendulum knife 12, the left side of the cutter body 111 is connected to the right side of the inner support ring 10 through a screw, the pendulum knife 12 is located on the right side of the cutter body 111, the right side of the cutter body 111 is provided with a U-shaped through slot 112 and a U-shaped blind slot 113, the U-shaped through slot 112 is communicated with the U-shaped blind slot, the left side of the cutter body 111 is located in the U-shaped through slot 112, a pin 17 passes through the right side of the cutter body 111 and the pendulum knife 12 located in the U-shaped through slot 112, the pin 17 is hinged to the pendulum knife 12, the pin 17 is fixed to the cutter body 111, and the right upper end of the pendulum knife 12 contacts with the left end of the push knife block 13 to move the pendulum knife 12 toward the peripheral wall of the oil pipe 19 and clamp the peripheral wall of the oil pipe 19 (as shown in fig. 1).
As shown in fig. 6-7, the U-shaped through slot 112 has a swing blade limiting elastic sheet 15, the swing blade limiting elastic sheet 15 has elastic end pieces 151, one of the elastic end pieces 151 abuts against the lower end surface 121 of the swing blade 12, the other elastic end piece 151 abuts against the bottom surface 114 of the U-shaped blind slot 113, a part of the swing blade limiting elastic sheet 15 is located in the U-shaped through slot 112, the swing blade limiting elastic sheet 15 is in a "Z" shape, and the swing blade 12 can swing in the opposite direction of the outer peripheral wall of the oil pipe 19 by the swing blade limiting elastic sheet 15.
Example 2
As shown in fig. 1-7, the working principle of the present invention is as follows:
and (3) allowing the tubing 19 to move left from the right end of the lower joint 14 and pass through the interior of the lower joint 14 to enter the interior of the main outer cylinder 3, allowing the coupling body 18 to move right by the left end of the coupling body 18 abutting against a thrust tool, and allowing the outer peripheral wall on the left side of the tubing 19 to be clamped on the inner peripheral wall on the right side of the coupling body 18 by the right movement of the coupling body 18 and the left movement of the tubing 19.
The left side of the upper joint 1 and the right side of the lower joint 14 are connected with a tool string which is convenient for fishing and cutting oil pipes, the upper joint 1 and the lower joint 14 are fixed, the coupling body 18 is enabled to move rightwards continuously, the peripheral wall of the left side of the oil pipe 19 is enabled to be clamped on the inner peripheral wall of the right side of the coupling body 18 all the time, the right end face of the coupling body 18 abuts against the left end face of the anchor grabbing shrapnel 4, namely, the thin teeth 41, the right end face of the anchor grabbing sleeve 51 and the left end face of the inner supporting ring 10 abut against the thrust roller bearing 8, the anchor grabbing sleeve 5 and the inner supporting ring 10 move rightwards, the cutter body assembly 11 moves rightwards through the right movement of the anchor grabbing sleeve 5 and the inner supporting ring 10, the shear pin 6 and the positioning reducing pin 9 are started to cut, the pendulum knife 12 at the moment is opened towards the opposite direction of the peripheral wall of the oil pipe 19 under the action of the pendulum knife limiting shrapnel 15, the cutter assembly 11 moves rightwards continuously, the upper right end of the pendulum knife 12 is contacted with the left end of the push knife block 13, so that the pendulum knife 12 moves or swings towards the peripheral wall of the oil pipe 19, namely, the peripheral wall of the oil pipe clamping piece 16 of the right clamping cutter 12 is clamped by the cutter.
The tool string that top connection 1 left side and lower clutch 14 right side are connected lets main urceolus 3 rotatory, the thrust instrument that rotatory coupling body 18 left end leaned on simultaneously makes rotatory coupling body 18 rotatory, the serration 41 of 4 left end faces of anchor grabbing shrapnel and the right-hand member face of coupling body 18 produce sliding friction, the anchor grabbing shrapnel 4 is rotatory, anchor grabbing sleeve 5 makes inner support ring 10 rotatory through thrust roller bearing 8, let cutter body subassembly 11 rotatory then pendulum sword 12 can rotate cut oil pipe 19's periphery wall.
After the outer peripheral wall of the oil pipe 19 is cut, the left-moving swinging cutter 12 of the coupling body 18 opens in the opposite direction of the outer peripheral wall of the oil pipe 19 under the action of the swinging cutter limiting elastic sheet 15, and the outer peripheral wall on the left side of the oil pipe 19 is always clamped on the inner peripheral wall on the right side of the coupling body 18, so that the coupling body 18 and the upper joint 1 or the lower joint 14 are lifted to fish the cut oil pipe section out of an oil well.
Example 3
The invention mainly aims at that: when the inner oil pipe of the oil well is blocked or buried and cannot be normally lifted out, a cutting tool needs to be arranged in the oil well in an oil pipe string connection mode, namely an alternate connection mode of the oil pipe body and the oil filling pipe body of the oil pipe body connecting hoop, the oil pipe string on the blocked or buried section is cut and fished to smoothly lift out of the well, and subsequent normal construction operation is recovered.
This instrument utilizes the instrument cluster that connects, and the cutting fishing operation of this body coupling oil pipe of big adopts brand-new structural configuration, guarantees that the instrument external diameter does not do under the circumstances that increases, and the maximization of oil pipe latus rectum, cutter body subassembly and main urceolus stack on the throne ensure that the instrument is gone into the in-process and can use big coupling body, and the cutting oil pipe body periphery wall that the pendulum sword track can also draw in.
After the tool string is assembled, the anchor-catching shrapnel is in an extending state (as shown in figure 4), when construction operation is performed and passes through the position of a coupling body, the shrapnel is subjected to radial outward expansion force, namely, the anchor-catching shrapnel is still in the original extending state, until the tool string is performed at a cutting position, the left end surface of the anchor-catching shrapnel is clamped on the right end surface of the coupling body, so that coupling anchoring action is completed (namely, an anchor-catching assembly and the right end surface of the coupling body are relatively fixed, no rotary displacement exists, and the cutting point is axially fixed with the anchoring point), force is slowly applied until a shearing pin is started to be sheared off, an upper joint drives a main outer cylinder and a cutter pushing block to squeeze a swinging cutter to inwards fold, when a cutter point (a cutting blade) of the swinging cutter is attached to the oil pipe body, wellhead rotary power is slowly started to start cutting (the cutter cutting rotary force is separated from the anchor-catching assembly through a transition shaft collar, namely, a thrust roller bearing, so that the anchoring point has no rotary movement and the stability of the tool is increased in the cutting process of the tool is increased), when the cutting torque is reduced, the tool string is then lifted, the tool string is repeatedly operated, until the torque is restored to be idle rotation torque before cutting, whether the cutting string is increased, and whether the tool string is lifted slightly, so that the suspended is finished.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A mechanical external cutting tool for oil pipe, comprising:
an upper joint (1);
the outer circumferential wall of one side of the upper joint (1) is inserted into the inner circumferential wall of the other side of the main outer cylinder (3), and the main outer cylinder (3) is connected with the upper joint (1) through a releasing shear pin (2);
one end of the anchor grab sleeve (5) abuts against the thrust roller bearing (8), the other end of the anchor grab sleeve (5) abuts against one end of the coupling body (18), the outer peripheral wall of the coupling body (18) is attached to the inner peripheral wall of the upper joint (1), and the anchor grab sleeve (5) is used for anchoring on the coupling body (18);
an inner support ring (10), the other end of the inner support ring (10) is abutted against the thrust roller bearing (8);
the cutter body assembly (11) is used for cutting an oil pipe (19) in a self-rotating mode, the other side of the cutter body assembly (11) is connected with one side of the inner supporting ring (10) through a screw, one side of the cutter body assembly (11) abuts against the other side of the push cutter block (13), and the push cutter block (13) is connected inside the main outer cylinder (3) through a screw;
and the outer peripheral wall of the other side of the lower joint (14) is connected with the inner peripheral wall of one side of the main outer cylinder (3) through threads.
2. A mechanical external cutting tool for tubing according to claim 1, characterized in that the right inner circumferential wall of the coupling body (18) abuts against the left outer circumferential wall of the tubing (19), the right inner circumferential wall of the coupling body (18) and the left outer circumferential wall of the tubing (19) are both tapered, and the left end of the coupling body (18) abuts against a thrust tool.
3. The mechanical external cutting tool for oil pipes as claimed in claim 1, characterized in that the grapple sleeve (5) and the internal support ring (10) are arranged inside the main outer cylinder (3), the positioning reducing pin (9) penetrates through the main outer cylinder (3) and is in interference fit with the outer peripheral wall of the internal support ring (10), a gap (7) is formed between the right end face of the grapple sleeve (5) and the left end face of the internal support ring (10), and the thrust roller bearing (8) is positioned in the gap (7).
4. Mechanical external cutting tool for oil pipes according to claim 1, characterized in that the grapple sleeve (5) has a grapple sleeve (51), the peripheral wall of the grapple sleeve (51) has a groove (52), the actuating shear pin (6) passes through the main outer cylinder (3) and is inserted into the groove (52), the right end face of the grapple sleeve (51) abuts against the thrust roller bearing (8).
5. A mechanical external cutting tool for tubing according to claim 4, wherein the grapple sleeve (5) is connected with a grapple shrapnel (4) by a screw, and the left end face of the grapple shrapnel (4) is anchored to the right end face of the coupling body (18).
6. An external mechanical cutting tool for tubing according to claim 5, characterized in that the left end face of the grapple spring (4) has serrations (41), the serrations (41) abutting against the right end face of the coupling body (18).
7. The mechanical external cutting tool for oil pipes as claimed in claim 1, characterized in that the right side of the inner support ring (10) is connected with the left side of the cutter body assembly (11) through screws, the cutter body assembly (11) is arranged between the main outer cylinder (3) and the push cutter block (13), and the right end of the push cutter block (13) is abutted against the main outer cylinder (3).
8. The mechanical external cutting tool for the oil pipe is characterized in that the cutter body assembly (11) is provided with a cutter body (111) and a swinging cutter (12), the left side of the cutter body (111) is connected with the right side of the inner support ring (10) through a screw, the swinging cutter (12) is positioned on the right side of the cutter body (111), the right side of the cutter body (111) is provided with a U-shaped through groove (112) and a U-shaped blind groove (113), the U-shaped through groove (112) is communicated with the U-shaped blind groove, the left side of the cutter body (111) is positioned in the U-shaped through groove (112), a pin shaft (17) penetrates through the right side of the cutter body (111) and the swinging cutter (12) positioned in the U-shaped through groove (112), the pin shaft (17) is hinged with the swinging cutter (12), and the pin shaft (17) is fixed on the cutter body (111).
9. The mechanical external cutting tool for oil pipes as claimed in claim 8, characterized in that the U-shaped through groove (112) is internally provided with a swing knife limiting elastic sheet (15), the swing knife limiting elastic sheet (15) is provided with elastic end sheets (151), one of the elastic end sheets (151) abuts against the lower end face (121) of the swing knife (12), and the other elastic end sheet (151) abuts against the bottom face (114) of the U-shaped blind groove (113).
10. The mechanical external cutting tool for oil pipes as claimed in claim 9, characterized in that the swing knife limit elastic sheet (15) is partially positioned in the U-shaped through groove (112), and the swing knife limit elastic sheet (15) is Z-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211629294.5A CN115628027B (en) | 2022-12-19 | 2022-12-19 | Mechanical external cutting tool for oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211629294.5A CN115628027B (en) | 2022-12-19 | 2022-12-19 | Mechanical external cutting tool for oil pipe |
Publications (2)
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| CN115628027B (en) | 2023-03-21 |
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